我国行政诉讼法中没有对行政诉讼的类型作出明确的规定，这给行政诉讼的实践带来许多问题。
There are not definite administrative litigation categories in our country's law, which brought a lot of problems in practice.
因特网固有的特点使传统信息检索暴露出许多问题。如信息过载、信息模糊、信息可靠性差等，这给用户利用信息带来了障碍。
The inherent features of Internet have shown many problems in traditional information retrieve, such as information overloading, information blurring and low accuracy.
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